Sedimentation of self-propelled Janus colloids: polarization and pressure

@inproceedings{Ginot2018SedimentationOS,
  title={Sedimentation of self-propelled Janus colloids: polarization and pressure},
  author={Félix Ginot and Alexandre Solon and Yariv Kafri and Christophe Ybert and Julien Tailleur and C{\'e}cile Cottin-Bizonne},
  year={2018}
}
We study experimentally—using Janus colloids—and theoretically—using Active Brownian Particles —the sedimentation of dilute active colloids. We first confirm the existence of an exponential density profile. We show experimentally the emergence of a polarized steady state outside the effective equilibrium regime, i.e. when the sedimentation speed vs is not much smaller than the propulsion speed v0. The experimental distribution of polarization is very well described by the theoretical prediction… CONTINUE READING

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